public bool TryDowngradeToReadLock(TimeSpan timeout, out IReadLockAcquisition readLockAcquisition)
{
var disposables = (IDisposable)null;
var ok = Owner.TryLockChildren(LockTypes.Read, timeout, out disposables);
if (ok)
{
ok = Owner.InternalLock.TryEnterReadLock(timeout.Milliseconds);
if (ok)
{
readLockAcquisition = new ReadLockAcquisition(Owner, disposables);
return true;
}
else
{
disposables?.Dispose();
}
}
readLockAcquisition = null;
return false;
}
public bool TryDowngradeToReadLock(TimeSpan timeout, out IReadLockAcquisition readLockAcquisition)
{
if(Owner.InternalLock.TryEnterReadLock(timeout.Milliseconds))
{
readLockAcquisition = new ReadLockAcquisition(Owner);
return true;
}
else
{
readLockAcquisition = null;
return false;
}
}
public bool TryAcquireReadLock(TimeSpan timeout, out IReadLockAcquisition readLockAcquisition)
{
if (InternalLock.RecursionPolicy == LockRecursionPolicy.NoRecursion &&
(InternalLock.IsReadLockHeld || InternalLock.IsUpgradeableReadLockHeld || InternalLock.IsWriteLockHeld))
{
readLockAcquisition = null;
return false;
}
if (InternalLock.TryEnterReadLock(timeout))
{
readLockAcquisition = new ReadLockAcquisition(owner: this);
return true;
}
else
{
readLockAcquisition = null;
return false;
}
}
public virtual bool TryAcquireReadLock(TimeSpan timeout, out IReadLockAcquisition readLockAcquisition)
{
if (InternalLock.RecursionPolicy == LockRecursionPolicy.NoRecursion &&
(InternalLock.IsReadLockHeld || InternalLock.IsUpgradeableReadLockHeld || InternalLock.IsWriteLockHeld))
{
readLockAcquisition = null;
return false;
}
var disposables = (IDisposable)null;
var ok = TryLockChildren(LockTypes.Read, timeout, out disposables);
if (ok)
{
ok = InternalLock.TryEnterReadLock(timeout);
if (ok)
{
readLockAcquisition = new ReadLockAcquisition(owner: this, disposeWhenDone: LockChildren(LockTypes.Read));
return true;
}
else
{
disposables?.Dispose();
}
}
readLockAcquisition = null;
return false;
}
